Mechanical drier.



PATENTED JUNE 1a, 19h07. W. M. GUMMER. MECHANICAL DRIER. PPLIOATIUN FILED 113.15. 1907.

INVEIVTOR. v M/Llham T4; Cummgv A TTORNE Ys 7. .d .www

Nin sTATIIs PATENT OFFICE- WILLIAM M. GUMMER, oF CLEVELAND, oH'Io.

MECHANICAL DmER. A

'State of Ohio, have invented certain new and useful Imv rovements in Mechanical Driers; and vI 'do eclare that the following is a full, clear, and exact description of the invention,

' lwhich will enable others skilled in the art to which it appertains to make and use the same. i 4

My Vinvention relates to mechanical driers -comprisinglw a revolving drying cylinder through w h the material to be dried passes 1n one direction and the heated drying medium passes in the opposite direction, and

the invention consists in a cylinder constructed in differential sections, all. substantially as shown and described and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a longitudinal section of the machine or drier, and Fig. 2 is a er'oss section thereof. Fig'."3 is an enlarged cross sectional view at one of the joints of the sections.

I am aware that drying machines or mechanical driersf'employing revolving or ro-f tary dryingcylinders are not at thigtime broadly new, and that in fact many machines have been patented and 'are in commonv use, and hence I lay no claim herein to originality or novelty in so far as such machines broadly considered Aare concerned. But I lain not aware that any one has ever before known or in a condition to give up its moisture and dryas speedily as possible.

used a machine constructed on the lines of the present invention and in whichthere are features `and details of novelty as will now appear. Thus, the drying cylinder4 C is shown as constructedfnot only in sections l, 2, 3 land 4 respectively, but the said sections are ldifferential in size or cross section, andl each section is of theV same cross-sectional area from end to end. The smallest section is at the head of the machine Where the raw material to be dried enters and where it is exposed to the direct heat of the furnace, F, as it issues thro ugh furnace outlet. The first and smallest section is thus exposed both externally and'internally to the greatest heat of the furnace', and where said heat can be` made most effective because the material en? ters bo th wet and cool, and needs to be placed By making the cylinder in y graduated sections as to cross section and y having the Specification of Letters Patent. i I y Appt( ma and February 15, 1907. sesamo. 357,596.

. equiva Patented June 18,1907.

sizes to'vary relatively about asmshown,v I am enabled, iirst, to obtain an annular off set Aor shoulder at each joint between sections which affords room to mterposea strong connecting ring G, and to provide openingsfor the ad-l mission of the products of combustion' and air at suitable intervals into the'` cylinder without perforating the wall of the cylinder for this purpose. The shape of s'aid connectin ring may vary considerably and be lent to the form shown,v but a convenient` form or shape is shown in cross-section and provided with a series of referably oblong openings 6 in its web or mid e portion. The

said openings or holes serve to .admit the products of combustion from the furnace to the cylinder, whence said products dow to the mouth of the cylinder and are drawn off by means of the usual'suction fan or blower located in'or above chute 7. The special form of ring has the advantage of furnishing two parallel surfaces extending in opposite directions and sufficiently4 spacedapart to rivet the cylinder. sections thereon, and the further advantage of affording draft or suction Openings which are above the plane or surface of the larger section into which the material is carried from the preceding and smaller sec-- tion, so that a wall is formed abouteach opening 6, and especially at the bottom thereof, which will preventl crowding of the material Vout through said openings when the feed thereof throughout the cylindermay be slow and there is disposition for it to pile 'up in the cylinder, more or less. This construction prevents loss of material through draft and suction holes 6 and avoids necessity of screens over said holes.

It is particularly important that the products ofcombustion and air should have free admission to the cylinde'rentirely around the same and' particularly to the' first section thereof, and that it should enter freely about the sides and top of same where there should be no obstruction., and this advantage is obtained in this construction because the holes 6 are so disposed and are -so related to the Walls about the cylinder that the inlet vthrou h the same is' especially effective at the sides and top of the cylinder. This advantage is further promoted and obtained in this invention especially by reason ofi-the "differential sizes of the I,cylinder sections.

G shown herein roo Assuming that we have the usualidrier wall inclosing the `cylinder in iwhich the' top and .diameter throughout its length and came so near to the wall at its sides and `top all along as to largely cut these portions off from exposure and conne the draft mostly to the bottom of the cylinder. Thenext result of this difference is that this style of cylinder in such settings as these will dry much more material in a given time and with given heat units than is possible in a straight cylinder or one which cuts off the side and top heat exposure in the fore part or end of the cylinder as a straight cylinder does.

Details of construction are the gear 9 about the rear end of the cylinder through which power i's applied thereto to rotate the same in its supporting rollers 12, and discharge openings 14 are formed in the rear end of the cylinder inside its closed end or head 15. Lift blades or ribs 16 run lengthwise of the cylinder sections. The front cylinder section is provided-with a special bearing head H, ,which has 'a tire -10 about the same running'on rollers 12 and has an inwardly projecting annular neck 16 in a ange 17 to which section 1 of the cylinder is secured. At the rear end there is a head J having tire 18 about the same runnin on rollers 12, and carrying head 15 of the cy inder and last cylinder section 4.

Obviously the details of construction just described, and in fact all others, may be modified more or less and remain Within the spirit and object of the invention.

A series 'of openings 20 in Harige 17 of bearing head H admit the heat at the very front of cylinder C and immediately about the discharge neck of chute 7.

What I claim is:

1. As a new article of manufacture, a drying cylinder formed in sections,v and rings connecting the sections rovided with openings' transversely throng the middle thereof, whereby draft ypassages are formed into the cylinder. v l

2. A drying, cylinder formed in sections of different sizes.,- and rings uniting adjacent ends of said sections equal to the dierence in the sizes thereof and provided with openings into the cylinder.

3. -A drying cylinder formed in sections and the end of one section smaller in diameter than the end of the adjacent section with which it connects, and rings connecting said adjacent ends having a series of holes about their middle portion.

4. In a drying apparatus, a rotary drying cylinder formed in sections arranged to discharge one into the other successively and varying in cross sections, and rings connecting said sections having webs with openings throu h the same.

5'. n a drying apparatus, a rotary drying cylinder formed in sections of different dialneters and each section having a uniform diameter and said sections increasing in cross sectional area from one end'of the cylinder to the other, and rings uniting said sections having holes through the same, whereby draft inlets to the cylinder are provided.

6. IIn a drying apparatus, a cylinder adapted to be rotated and provided with an inlet at one end and a discharge at the other end, and said cylinder constructed of a series of sections of different diameters and cach section having the same diameter, and inlet openings `for the products of combustion at the ends of said sections. 7. A drying apparatus comprising a cylin- .der composed of sections of different diameters and substantially angle shaped rings connecting said sections having draft openings in the Webs thereof.

8. A drying apparatus comprising a drier chamber, in combination with a drying cylinderv formed Yin sections of varying. sizes smallest at the front end of the cylinder, and a furnace at the front of said chamber adapted to discharge immediately beneath the' said smallest section of the cylinder.

9. A drying apparatus comprising a drying chamber of uniform depth from endto end, in combination with a drying cylinder largest at-the vrear formed of sections of increasing cross-sectional area from the front to the rear of said chamber.

In testimony whereof I sign this specification in the presence of two witnesses.

WILLIAM M. CUMMER. Witnesses:

W. H. HEYL, W. M'AXWELL GREENE.

IOO 

